CN204479836U

CN204479836U - Finder

Info

Publication number: CN204479836U
Application number: CN201420575745.6U
Authority: CN
Inventors: 埃兰·弗里希; 欧德利亚·科斯洛维斯凯; 鲁埃尔·哈弗瑞哈米
Original assignee: Ao Fei Co Ltd
Current assignee: Ofil Ltd; Ao Fei Co Ltd
Priority date: 2014-01-10
Filing date: 2014-09-30
Publication date: 2015-07-15
Anticipated expiration: 2024-09-30
Also published as: US8781158B1; GB201400688D0; GB2522078B; GB2522078A; WO2015104593A1

Abstract

The utility model discloses a kind of finder for making environment Visualization, this device comprises one or more land corona discharge and one or more object.In UVB radio frequency channel, adopt UVB light to produce the UVB image not having object of scene at least partially through corona peak tunable filter, this light filter is configured to filter enough non-terrestrial corona light, so that the UVB image produced does not have object.Analyze this do not have the UVB image of object with by its pixel classifications for corona discharge pixel or non-corona discharge pixel.When overlapping with the visible images of scene do not have the derivant of the UVB image of object be show on the display apparatus time, the pixel being classified as corona discharge pixel is the visibility being shown as increasing, and the pixel being classified as non-corona discharge pixel is the visibility being shown as reducing.In certain embodiments, light filter have [290nm, 700nm] spectrally at least 4 average optical.

Description

Finder

Technical field

The present invention relates to the apparatus and method for the visible light wave range of generating scene and the vision-mix of UV wave band, such as, for observing the land corona discharge at background Scene object.

Background technology

Fig. 1 shows UVB corona absorption peak, is included in the peak that wavelength is 283nm, 297nm, 316nm, 337nm and 353nm.

Utility model content

Embodiment relates to a kind of mixing finder, and wherein, visible light wave range imaging device is in the visual field of UVB imaging device at least partially.

Some embodiments relate to mixing UV-visible light wave range finder, and comprise the method for visible light wave range and UVB imaging device.In some embodiments, (i) visible light wave range imaging device at least partially (such as, the photodetector of its array) is disposed in the visual field of UVB imaging device; And/or common optical axis shared by (ii) visible light wave range and UV wave band imaging device.

In order to produce vision-mix, the electricity output exported from each visible light wave range and UV wave band imaging device (or its derivant) is received by image uniting unit, such as, comprises the unit of electronic circuit.

Although not necessarily, but preferably, common optical axis shared by visible light wave range and UV wave band imaging device, correctly to produce vision-mix, depends on not convenient and/or insecure image processing algorithm correctly to superpose the image of visible light wave range and UV wave band.

One " value " be placed on by visible light wave range camera in the visual field of UVB imaging device is: this visible light wave range camera light from scene capable of blocking (such as can replace with beam-splitter), and the light of this scene will be used to the UV image producing scene in addition.Special challenge can be produced in the situation like this: need to adopt belt frequency spectrum light filter, only have the light of specific UV wavelength to incide on the photodetector of UVB imaging device.But the present inventor discloses now: if adopt enough little visible light wave range imaging device, photoresistance may be made to break and minimize, so that UVB imaging device still receives enough light to produce UV image that is correct and/or commercial useful scene.

By visible light wave range imaging device being placed on before UVB imaging device (instead of depend on beam-splitter or spectroscope visible ray is directed to " close to " position of UVB imaging device), may provide mixing finder, this device is more compacter and/or narrow than device of the prior art.

In a non-limiting application, mixing finder can be adopted to browse corona discharge---such as, be used for differentiating the corona discharge that sends of electronic equipment.Compacter and/or narrower mixing finder is more economical, larger application can be promoted (such as, employee by electronics corporation), and more diligent qualification (then keeping in repair), and more diligent discriminating (then keeping in repair) (defective environmental disruption damage electrical equipment).

In some embodiments, UV is only avoided arriving UVB imaging device by with lower device resistance shelves: comprise (i) visible ray section imaging device (or its part) and (ii) in visible ray section imaging device and the wired connection between other parts mixing finder---such as, and the data cube computation between UVB imaging device and the circuit of imaging combining unit.In order to make the blocking-up for the UV light from scene minimize, such method can be adopted: by wireless connections, visible ray section view data is transferred to imaging combining unit from visible ray section image-generating unit.This can make visible ray section image-generating unit can be configured on " wired connection island "---is positioned in the visual field of UVB imaging device completely, without the need to any wired connection weakening UV light.

about the embodiment of UVB/ visible ray mixing finder---such as, be configured to produce the UVB image lacking object

The present inventor discloses a kind of UVB/ visible ray mixing finder now, for observing the land corona discharge with one or more object association in scene.One or more object (such as, electronic equipment), one or more land corona discharges of sending corona in this scenario, and optional one or more non-corona object (such as, desk, chair etc.).At present disclosed optics and image treatment features make described apparatus and method be particularly useful in observe the corona discharge in " daytime/indoor " sight---namely, there is solar radiation that is relatively low but the not level of signifiance.

" land corona " electric discharge is the concept compared with sun corona discharge.

Apparatus and method disclosed in this invention are the combinations based on following feature: (i) adopts special, high-selenium corn degree optical filter, are configured to produce " not having object " UVB image; (ii) analyze this do not have the UVB image of object with by its pixel classifications for " corona discharge pixel " or " non-corona discharge pixel "; And overlapping for the mixing comprising the image of UVB and visible light wave range or coincidence pattern picture are shown to user by (iii) in a certain way, which adds the visibility of corona discharge pixel and/or decreases the visibility of non-corona discharge pixel.

The present invention relates to the imaging of the scene comprising object and one or more land corona discharge, to produce the UVB image of this scene " not having object ".For the present invention, the UVB image of this scene " not having object " only comprises the UVB image of corona discharge, comprises noise alternatively, does not have the image of any object in this scenario.Therefore, by definition, appear in the UVB image of " not having object " without any object macroscopic in actual scene.As disclosed below, the UVB image being somebody's turn to do " not having object " regulates the light filter of corona to produce by application, this light filter: (i) at least 95% or at least 97% [280nm, 700nm] spectrum, there is catch light density (such as, OD value is at least 4 or at least 6 or at least 8 or at least 10), and (ii) is at least one wavelength in the 10nm at one or more UVB corona peak, there is low optical density (such as, OD value is maximum 1).

There is no the UVB image of object and its function that can lack for observing the corona discharge in their proper environment of the contiguous object of scene itself.However, when do not have the UVB image of object (or its derivant) be placed on the visual picture of scene above time, for first, in order to observe the corona discharge of " adjacent ambient " at it, and regardless of such fact, namely these " contiguous objects " are not present in UVB image.

Because the UVB image produced is attempted to be placed on above visual picture, may produce UVB image by this way, which is that very corona is special to observe more weak corona.Producing does not have " price " of the UVB image of object be: this UVB image may not muchly for providing environmental data, because lack object in the images.What the present inventor disclosed now is a kind of mixing arrangement, and wherein, this " price " is incoherent, because the image of visible ray section produces this function now.

Because in fact UVB image does not have object, can suppose, its non-corona discharge pixel can not provide significant information---namely, do not need display background object to provide correct environment to the image of corona discharge.Because the non-corona pixel performance of UVB image goes out noise, and the object background of chi necessity (namely, need to be used for providing environment to corona discharge), may (A) be the non-corona discharge pixel of (i) corona discharge pixel or (ii) by the pixel classifications of UVB image.Can carry out by this way in the display of the mixing UVB-visible images of display device, which increases the visibility of land corona pixel and reduces the visibility of non-corona pixel.Such as, non-corona pixel can by effectively from mixing UVB-visible images " erasing ".

When light filters out by high-selenium corn degree light filter, from UVB image, effectively eliminate all objects, to produce the image not having object.But this device does not need to depend on UVB image or channel to show these objects so that " visible environmental " is given to corona discharge---replace ground, visible ray section channel provides that this is functional.Correctly show " corona discharge environment " by depending on visible ray channel, the special light filter of high-selenium corn degree can be applied, this light filter can eliminate object from UVB image, correctly to observe " weak " corona discharge, to provide the more high sensitivity for corona.

Disclosed herein that a kind of for making the system of environment Visualization, described scene comprises one or more land corona discharge and one or more object, described scene is illuminated by the radiant light of non-terrestrial corona discharge, described system comprises: a. ultra-violet bands (UVB) imaging device, be configured at least one the UVB image not having object containing the part of object producing described scene the scene illuminated from non-terrestrial corona discharge radiant light, the described image not having the UVB image of object to comprise the corona discharge of described scene, and lack the image of all scenario objects, described UVB imaging device comprises wavelength dependence type light filter, it is configured to abundant filtering non-corona UVB radiant light, so that the image produced does not have object, described wavelength dependence type light filter has optical density OD (λ) value: the i. that meets the following conditions at wavelength coverage [280nm, 700nm] min [OD (λ), 10] mean value is the value of at least x, x is at least 2 or at least 3 or at least 4 or at least 5 or at least 6 or at least 7 or at least 8, ii. for being selected from UVB corona peak scope group { [281nm, 285nm], [292nm, 302nm], [308nm, 320nm], [334nm, 340nm], [351nm, 362nm] } at least one wavelength of at least one scope, the optical density OD value of described light filter is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1, b.UVB image processing apparatus does not operationally have the UVB Images Classification of object to be corona discharge pixel or non-corona discharge pixel by described, and does not have the UVB image of object to produce UVB process image described in processing according to the result of pixel classifications, c. visible light wave range imaging device, is configured to produce visible light wave range image from the visible ray of described scene, and d. video display devices, be configured to display visible light wave range-UVB vision-mix, it is the superposition with hypograph: (i) described visible light wave range image or its derivant, and (ii) described UVB process image or its derivant, described UVB image processing apparatus is configured to carry out image procossing so that increase the visibility of corona discharge pixel and/or reduce the visibility of non-corona discharge pixel.

In some embodiments, described UVB image processing apparatus is the change that the corona discharge classification limite function be configured to by changing described pixel responds the estimation ambient level of non-corona discharge UVB radiant light, so that increase described limite function in response to the increase estimating ambient level, and reduce described limite function in response to the minimizing estimating ambient level.

In some embodiments, described system is configured to the estimated strength of the non-corona discharge UVB radiant light obtaining surrounding according at least one aspect following: (i) fill-in light detecting device; (ii) locator data; (iii) daytime; And (iv) climatic data.

In some embodiments, described system is configured to the ambient level by estimating non-corona discharge UVB to the analysis of the UVB image not having object.

In some embodiments, described pixel classifications carries out according to the time variations detected in the UVB image not having object.

May alternatively or additionally, the pixel classifications of object pixel carries out according to the analysis of adjacent pixels.

May alternatively or additionally, the pixel classifications of object pixel carries out according to brightness-limit algorithm.

In some embodiments, for the wavelength of at least 5nm in UVB corona peak scope group, the optical density OD value of light filter is maximum 1.

In some embodiments, the value being at least y, y at the mean value of the min [OD (λ), 10] of [400nm, 700nm] scope is at least 4 or at least 6 or at least 8 or at least 10.

In some embodiments, [mean value of the min [OD (λ), 10] of [280nm, 400nm] scope is the value of at least z, z is at least 4 or at least 6 or at least 8 or at least 10.

In some embodiments, for being selected from UVB corona peak scope group { [281nm, 285nm], [292nm, 302nm], [308nm, 320nm], [334nm, 340nm], [351nm, 362nm] at least one wavelength of at least one scope, the optical density OD value of light filter is maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1.

In some embodiments, i () described UVB imaging device comprises first group of photodetector, described visible ray section imaging device comprises second group of photodetector, described second group of photodetector is configured in the visual field of described UVB imaging device, and/or common optical axis shared by (ii) described UVB imaging device and visible ray section imaging device.

In some embodiments, (i) described UVB imaging device comprises first group of photodetector, and described visible ray section imaging device comprises second group of photodetector, and described second group of photodetector is configured in the visual field of described UVB imaging device.

In some embodiments, common optical axis shared by described UVB imaging device and visible ray section imaging device.

Disclosed herein that a kind of for making the system of environment Visualization, described system comprises: a.UVB imaging device, comprises first group of photodetector and wavelength dependence type light filter; Described UVB imaging device is configured to the UVB image producing scene from the UVB light of scene incident on described first group of photodetector, described wavelength dependence type light filter has optical density OD (λ) value: the i. that meets the following conditions at wavelength coverage [280nm, 700nm] the mean value of min [OD (λ), 10] be at least 2 or at least 3 or at least 4 or at least 5 or at least 6 or at least 7 or at least 8; Ii. for being selected from UVB corona peak scope group { [281nm, 285nm], [292nm, 302nm], [308nm, 320nm], [334nm, 340nm], [351nm, 362nm] } at least one wavelength of at least one scope, the optical density OD value of described light filter is the value of maximum y, y is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1; B. visible light wave range imaging device, comprises second group of photodetector, and described visible light wave range imaging device is configured to produce visible light wave range image from the visible ray of scene incident on described second group of photodetector; And c. video display devices, be configured to display visible light wave range-UVB vision-mix, it is the superposition with hypograph: (i) described visible light wave range image or its derivant; And (ii) described UVB image or its derivant.

In some embodiments, common optical axis shared by described UVB imaging device and described visible light wave range imaging device.

In some embodiments, described second group of photodetector is arranged in the visual field of described UVB imaging device.

In some embodiments, described UVB imaging device and described visible light wave range imaging device are mechanically connected to each other (such as, adhering to mutually directly or indirectly).

In some embodiments, described second group of photodetector is the part on the wired connection island be positioned at completely in the visual field of described UVB imaging device; Described video display devices receives the visible light wave range image transmitted from described second group of photodetector by wireless connections.

In some embodiments, from maximum 50% (or maximum 40% or maximum 30% or maximum 20% or maximum 10%) intensity of described scene UVB only stop by the part of the visible light wave range in the visual field of described UVB imaging device.

In some embodiments, the distance between first group of photodetector and second group of photodetector is that to be mechanically restricted to maximal value be maximum 1 meter or maximum 50cm or maximum 30cm or maximum 20cm or maximum 10cm.

In some embodiments, described system also comprises: b.UVB image processing apparatus, operationally from UVB image, produces UVB process image, so that increases the visibility of corona discharge pixel and/or reduce the visibility of non-corona discharge pixel; Described video display devices is configured to show the visible light wave range-UVB vision-mix comprising described UVB process image or derivatives thereof, and described UVB image processing apparatus is configured to produce UVB process image.

In some embodiments, described system is the estimated strength being configured to obtain non-corona discharge UVB radiant light around, and from described UVB image, produces UVB process image according to the estimated strength of non-corona discharge UVB radiant light.

In some embodiments, described UVB image processing apparatus is the change being configured to respond by changing limite function the estimation ambient level of non-corona discharge UVB radiant light, so that the contrast be increased between corona discharge pixel and non-corona discharge pixel is in response to the increase estimating ambient level.

Disclosed herein that a kind of system making environment Visualization, described system comprises: a.UVB imaging device, comprises first group of photodetector and wavelength dependence type light filter; Described UVB imaging device is configured to the UVB image producing scene from the UVB light of scene incident on described first group of photodetector; B. visible light wave range imaging device, comprise be arranged on described UVB imaging device the visual field in second group of photodetector, described visible light wave range imaging device is configured to produce visible light wave range image from the visible ray of scene incident on described second group of photodetector; And c. video display devices, be configured to display visible light wave range-UVB vision-mix, it is the superposition with hypograph: (i) described visible light wave range image or its derivant; And (ii) described UVB process image or its derivant.

In some embodiments, described UVB imaging device is configured to be incident on from the UVB light of scene the UVB imaging device that described first group of photodetector produces the image of scene.

In some embodiments, also comprise the UVB wavelength dependence type light filter of the light path be arranged between described scene and described first group of photodetector, the optical density change that described UVB wavelength dependence type light filter has filter value heterogeneous in UVB spectrum so that described UVB wavelength dependence type light filter has functional relation with the wavelength in UVB spectrum.

In some embodiments, also comprise the UVB wavelength dependence type light filter of the light path be arranged between described scene and described first group of photodetector, described wavelength dependence type light filter has optical density OD (λ) value: the i. that meets the following conditions at wavelength coverage [280nm, 700nm] min [OD (λ), 10] mean value is the value of at least x, x is at least 2 or at least 3 or at least 4 or at least 5 or at least 6; Ii. for being selected from UVB corona peak scope group { [281nm, 285nm], [292nm, 302nm], [308nm, 320nm], [334nm, 340nm], [351nm, 362nm] } at least one wavelength of at least one scope, the optical density OD value of described light filter is the value of maximum y, y is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1.

In some embodiments, also comprise the sunspot filtrator of the light path be arranged between described scene and described first group of photodetector, described sunspot filtrator has optical density OD (λ) value: the i. that meets the following conditions at wavelength coverage [280nm, 700nm] at least one wavelength, the optical density OD of described filtrator is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1; Ii. the value being at least x, x at the mean value of the min [OD (λ), 10] of wavelength coverage [280nm, 700nm] is at least 2 or at least 3 or at least 4 or at least 5 or at least 6 or at least 7 or at least 8.

In some embodiments, also comprise the sunspot filtrator of the light path be arranged between described scene and described first group of photodetector, described sunspot filtrator has optical density OD (λ) value: the i. that meets the following conditions at wavelength coverage [280nm, 700nm] in most of wavelength, the optical density OD of described filtrator is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1; Ii. the value being at least x, x at the mean value of the min [OD (λ), 10] of wavelength coverage [280nm, 700nm] is at least 2 or at least 3 or at least 4 or at least 5 or at least 6 or at least 7 or at least 8.

Disclosed herein that a kind of system making environment Visualization, described system comprises: a.UVB imaging device, comprises first group of photodetector and UVB-wavelength dependence type light filter; Described UVB imaging device is configured to the UVB image producing scene from the UVB light of scene incident on described first group of photodetector; Described UVB-wavelength dependence type light filter has the filter value heterogeneous at UVB spectrum; B. visible light wave range imaging device, comprises second group of photodetector, and described visible light wave range imaging device is configured to produce visible light wave range image from the visible ray of scene incident on described second group of photodetector; And c. video display devices, be configured to display visible light wave range-UVB vision-mix, it is the superposition with hypograph: (i) described visible light wave range image or its derivant; And (ii) described UVB process image or its derivant.

In some embodiments, UVB image processing apparatus operationally from UVB image, produces UVB process image, so that increase the visibility of corona discharge pixel and/or reduce the visibility of non-corona discharge pixel; Described video display devices is configured to show the visible light wave range-UVB vision-mix comprising described UVB process image or derivatives thereof, and described UVB image processing apparatus is configured to produce UVB process image.

Here disclosing UVB-visible ray commingled system and the method for making environment Visualization, comprising one or more land corona discharge and one or more object.At UVB channel, at least partially scene there is no a UVB image of object time adopt UVB light to produce, this UVB light through corona peak switchable filter, this light filter be configured to filter enough non-terrestrial corona light so that produce UVB image time there is no object.This does not have to analyzed as being its pixel classifications during the UVB image of object is corona discharge pixel or non-corona discharge pixel.When the derivant of the UVB image not having object is placed on before the visible ray section image of scene, be shown on the display apparatus during this image, the pixel being classified as corona discharge is that the visibility increased shows, and the pixel being classified as non-corona discharge is the visibility reduced shows.In some embodiments, this light filter has in the average optical of [290nm, 700nm] spectrum is at least 4.

Embodiment

The present invention here describes in conjunction with appended accompanying drawing by means of only the mode of embodiment.Now detailed in these accompanying drawings, it is emphasized that, the feature shown by embodiment is only for the illustrative discussion of the preferred embodiment of example system, and is believed to be the useful and sufficient understanding of the concept aspect be conducive to principle of the present invention.In this, do not attempt showing CONSTRUCTED SPECIFICATION of the present invention in greater detail, and be only the required content that basis of the present invention is understood, the instructions provided by reference to the accompanying drawings makes those skilled in the art understand how to implement several form of the present invention, and how these embodiments of Production and application.

In order to brief description, some clear and definite combinations of multiple different characteristic are presented at clearly in these accompanying drawings and/or relevant description.Here disclose, the combination in any of the device disclosed or the feature of method can combine in any way---combination in any comprising feature---can be included in any embodiment or from any embodiment and omit.

Fig. 2 is side view, shows: (i) scene 200, comprises macroscopic corona emission object 220A, and the sightless corona discharge 230A of naked eyes; And (ii) is for the UVB-visible ray section mixing arrangement 100 to scene 200 imaging.Fig. 3 is the schematic diagram of the observation scene from mixing arrangement 100.This scene comprises non-corona object 210A-210E (such as, desk, chair etc.) and corona emission object 220A, and all these objects are all macroscopic.For simplified illustration, non-corona object 210A-210E does not show in fig. 2.

Fig. 4 A is the block scheme of the mixing imaging device 100 for observing a scene (such as scene 200).This mixing imaging device comprises: (i) visible ray section image-generating unit 500; And (ii) UV image-generating unit 400.

UV image-generating unit 400 comprises: (i) lens 420, and it can pass through at least some UV light; And (ii) UV imageing sensor 430, comprising: first group of photodetector 432 (such as application CMOS or CCD technology or arbitrarily other technology known in the art).Such as, lens 420 are configured to light to focus on the photodetector 432 of first array from scene 200.UV imageing sensor 430 produces the electronic image of scene 100---and this can be multiple image (such as, video flowing).Alternatively, UV image-generating unit 400 comprises light filter 410, before it can be positioned in lens 420 after (as shown in Figure 3) or lens 420.

Visible ray section image-generating unit 500 comprises: (i) lens 520, and it can pass through the light of at least some visible ray section; And (ii) visible ray section imageing sensor 530, comprise second group of photodetector 532 (such as, application CMOS or CCD technology or arbitrarily other technology known in the art).Such as, lens 520 are configured to light to focus on the photodetector 532 of first array from scene 200.Visible light image sensor 530 produces the electronic image of scene 100---and this can be multiple image (such as, video flowing).

The outstanding feature of of system is as shown in Figure 4 A: visible ray section image-generating unit 500 is arranged in the visual field of UV image-generating unit 400 at least partially.Such as, visible ray section image-generating unit 500 can be installed to device case and/or configure consequently visible ray section image-generating unit 500 at least partially in addition so is at least partially be arranged in the visual field of UV image-generating unit 400.

Therefore, as shown in Figure 4A, from scene 200 at least some only due to visible ray section image-generating unit 500 at least partially existence (such as, due to the existence of first group of photodetector 532) and avoided reaching first group of photodetector 432 by stop.Therefore, in certain embodiments, preferably apply relatively little image-generating unit 500 and/or relatively little second group of photodetector 532, to make, aforesaid photoresistance is disconnected to be minimized.In a specific embodiment, visible ray section image-generating unit 500 can be " very little camera ", the minicam such as adopted in many mobile phones.

In different specific embodiments, UV from maximum 50% (or maximum 40% or maximum 30% or maximum 20% or maximum 10%) light intensity of scene only (such as, is blocked by second group of photodetector 532) in the visual field of UVB imaging device 400 by the part blocks of visible ray section imaging device 500.No matter for the entirety of UV spectrum or the part for UV spectrum, this is all possible be genuine.Therefore, in a specific embodiment, UVB from maximum 50% (or maximum 40% or maximum 30% or maximum 20% or maximum 10%) light intensity of scene only (such as, is blocked by second group of photodetector 532) in the visual field of UVB imaging device 400 by the part blocks of visible ray section imaging device 500.Alternatively, or in addition, UVC from maximum 50% (or maximum 40% or maximum 30% or maximum 20% or maximum 10%) light intensity of scene only (such as, is blocked by second group of photodetector 532) in the visual field of UVB imaging device 400 by the part blocks of visible ray section imaging device 500.

Represent that the visible ray of scene 200 and each electric signal (such as, analog and/or digital electric signal) of UV image export from visible ray section image-generating unit 500 and UV image-generating unit 400 respectively respectively, and received by image composing unit 560.Image composing unit 560 is from forming visible ray section-UV vision-mix with hypograph: (i) visible ray section image (image namely, exported by visible ray section image-generating unit 500) or its derivative image; And (ii) UV image (image namely, exported by UV image-generating unit 400) or its derivative image.This vision-mix can electronics formed or optics formed or formed with other any-modes.

An example of " derivant " of UV image is the UV image after process.Therefore, just as shown in Figure 4 B, the output of UV image-generating unit received by UV imaging processor 460.UV imaging processor 460 produces the UV image after process, and it is received as the output being produced visible ray section-UV vision-mix by image composing unit 560.

Preferably, visible ray section image-generating unit 500 and UV image-generating unit 400 share common optical axis.In certain embodiments, visible ray section image-generating unit 500 is enough little, visible ray section image-generating unit 500 can be installed so carefully to guarantee correct orientation angle, so that visible ray section image-generating unit 500 and UV image-generating unit 400 share common optical axis.

In certain embodiments, visible ray section image-generating unit 500 is the outsides of the field hole being positioned in UV image-generating unit 400.

In certain embodiments, UVB imaging device and/or visible ray section imaging device be at least 5 degree or at least 7.5 degree at least 10 degree or at least 12.5 degree at least 15 degree or at least 20 degree.

It should be noted that, in any accompanying drawing, comprise Fig. 4 A-4B, do not attempt to show all parts---such as, image intensifier (not shown) also can be used---such as, see PCT/IL1999/000381, publication number is WO/2000/005536, and name is called " SOLAR BLIND UV VIEWING APPARATUS AND CAMERA ".

Fig. 4 C-4E shows a kind of device, comprises visible ray section image-generating unit 500 and UV image-generating unit 400---and in figure 6, they have optical axis along " X " axle, also show the lens 420 of UV image-generating unit 400.

As shown in Fig. 4 F, be by wired connection 502 at visible ray section image-generating unit 500 and the electrical connection of other parts of described device, unfortunately, blocked UV light and reached UVB imaging device.In order to overcome this difficulty, the wireless connections that wired connection 502 can be replaced with in isolated system.

UV light filter 410---UVB embodiment

Alternatively, UV image-generating unit 400 comprises light filter 410.

In certain embodiments, the optical density OD (λ) of light filter 410 represents any one or two situations of following situation:

I. be at least 2 or at least 3 or at least 4 or at least 5 or at least 6 or at least 7 or at least 8 or at least 9 or at least 10 at the mean value of the min [OD (λ), 10] of section [280nm, 700nm].

Ii. for being selected from UVB corona peak scope group { [281nm, 285nm], [292nm, 302nm], [308nm, 320nm], [334nm, 340nm], [351nm, 362nm] } at least one within the scope of at least one wavelength, the value of the optical density OD of light filter is maximum y, y value is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1.

In certain embodiments, for being selected from UVB corona peak scope group { [281nm, 285nm], [292nm, 302nm], [308nm, 320nm], [334nm, 340nm], [351nm, 362nm] at least one scope, for the most of wavelength in " scope of selection ", the optical density OD value of light filter 410 is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1.

In certain embodiments, be at least 2 or at least 3 or at least 4 or at least 5 or at least 6 at the mean value of the min [OD (λ), 6] of scope [280nm, 700nm].

Relate to some specific embodiments of A-B to show as: be at least 2 or at least 3 or at least 4 or at least 5 or at least 6 or at least 7 or at least 8 or at least 9 or at least 10 at the mean value of the min [OD (λ), 10] of scope [A nm, B nm].In certain embodiments, for A=290nm, B=700nm, this is genuine.Alternatively, or in addition, for A=280nm, B=400nm, this is genuine.Alternatively, or in addition, for A=280nm, B=500nm, this is genuine.Alternatively, or in addition, for A=280nm, B=600nm, this is genuine.Alternatively, or in addition, for A=400nm, B=450nm, this is genuine.

UV light filter 410---UVC embodiment

Alternatively, UV image-generating unit 400 comprises light filter 410.

In certain embodiments, light filter 410 is also called " day blind light filter ".

According to first embodiment, day, blind light filter met the characteristic of following two aspects:

I. at least one wavelength in scope [220nm, 280nm], the optical density OD of light filter 410 is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1.

Ii. the value being at least x, x at the mean value of the min [OD (λ), 6] of scope [280nm, 700nm] is at least 4 or at least 5 or at least 5.5 or at least 6.

In certain embodiments, for most of wavelength of scope [220nm, 280nm], the optical density OD of light filter 410 is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1.

According to second embodiment, the blind light filter of light meets the characteristic of following two aspects:

Ii. the value being at least x, x at the mean value of the min [OD (λ), 10] of scope [280nm, 700nm] is at least 4 or at least 5 or at least 5.5 or at least 6 or at least 7 or at least 8 or at least 9 or at least 10.

In certain embodiments, at least one wavelength in scope [220nm, 280nm], the optical density OD of light filter 410 is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1.

Such as, as discussed below, what light filter 410 had is at least 4 in the average optical of [290nm, 700nm] spectrum.

Although but be not restriction, in certain embodiments, the existence of the light filter 410 in image-generating unit 400 means: the UV image formed by lens 420 and imageing sensor 430 does not have object---namely, in scene 200, all images do not have object.Such as, can by adopting day blind light filter or realized by the one or more corona peaks adopting UVB light filter to forward in UVB spectrum.

Replace the UV image having scenario objects, for the UV image of " not having object ", this UV image only comprises corona image 230 and possible noise.In the hypothesis lacking light filter 410, the image produced by image-generating unit 400 in fact will be the image of the object 210,220 of scene.For the specific examples of UVB, those skilled in the art can understand the discussed physical characteristics of UVB corona peak tunable filter 410 about producing the light filter not having object below see Figure 11 A-11E.Such as, as discussed below, light filter 410 can have [290nm, 700nm] spectrally at least 4 average optical.

With reference now to Fig. 5-12, explain the specific embodiment relating to " the UV image not having object ".Although this reality is produced (such as, producing at image-generating unit 400), this is optional.Meanwhile, in certain embodiments, UV image-generating unit 400 is a kind of UV image-generating units 400, although for all embodiments, this is not restriction.

Fig. 5 is the schematic diagram not having the UVB image of object of the scene 200 of the Fig. 2 produced by UVB image-generating unit 400.Therefore, in the UVB image of object, object 210A-210E is not had, 220A not having shown in Fig. 5.But, in this UVB image, there is halation 230A discharge.

On the contrary, Fig. 6 shows the schematic diagram of the visible ray section image of the scene 200 of the Fig. 2 produced by visible ray section image-generating unit 500.

Also show in figure 3: (i) can through the lens 420 of UVB light; (ii) imageing sensor 430 (such as, CMOS or CCD or comprise other suitable technology arbitrarily) of UVB sensitivity; (iii) can through the lens 520 of visible ray; And (iv) visible ray section imageing sensor 530 (such as, CMOS or CCD or comprise other suitable technology arbitrarily).

Once not have the UVB image (see Fig. 5) of object to be synthesized by image composing unit 560 with visible ray section image (see Fig. 6), this two objects and corona can be observed on display unit 580.This makes to observe corona discharge in the proper background of adjacent object 210,220---such as, see Fig. 7.

In order to obtain the result of Fig. 7, UVB-visible ray section mixing finder 100 disclosed by the invention applies the combination of following characteristics: the wavelength dependence feature (see below according to the discussion of Figure 11 A-11E) of (i) UVB light filter 410; And (ii) is the corona special image process 460 of corona discharge pixel or non-corona discharge pixel 450 based on the pixel classifications of the UVB image by not having object.

This image procossing will be discussed see Fig. 8-10.Especially, Fig. 8 to show by image-generating unit 400 at four time points---the example not having the image of object of the scene 200 that t1, t2, t3 and t4 produce.Center facing to each image is corona image.Obviously, in any four images without any the image of object.But, be additional to the image of corona, can noise in the UVB image not having object---see ash gray point.Although the given shape of corona discharge can not change in time and changing, its position and overall shape are relative constancy, for noise.On the contrary, the position of noise spot obviously changes in time.

With further reference to Fig. 8, should be noted, because the optical characteristics of light filter 410, can suppose: non-corona discharge pixel is actually noise, instead of " object pixel " of object 210,220, these pixels must be kept to provide " image background " of the vision-mix shown by unit 280 (for example, see Fig. 7).Not needing to keep these non-corona images---the visible ray section image produced by image-generating unit 500 provides this background information.

Therefore, can realize: each pixel classifications is corona discharge pixel or non-corona discharge pixel by (i); And (ii) non-corona discharge pixel.Such as, classification can be performed by sorter 450.Graphics processing unit 460 can change the content of the UVB image not having object, so that shows vision-mix once by unit 580, and (i) improves the visibility of corona discharge pixel; And/or (ii) reduces the visibility of non-corona pixel.

Show the schematic diagram of the result of a kind of like this corona discharge classification based on UVB imaging processing program in fig .9, wherein, eliminate " noise pixel ", or change into and mix to make their visibility to reduce with their surrounding pixel.Corona image in fig .9 relates to the average shape of some kinds in the time interval [t1, t4].

Comparison diagram 8 and Fig. 9, obviously, the non-corona discharge pixel of grey is sightless in fig .9, compared to Fig. 8---the pixel in this example, being categorized as " non-corona discharge pixel " can have " empty data " so that invisible in mixed pixel.Alternatively, or in addition, corona discharge pixel can be made to brighten.In another embodiment, the color of corona discharge pixel can be changed to make them more visible in vision-mix.In another embodiment, a border can be drawn to make them more visible in vision-mix around corona discharge pixel.These measurements can be carried out according to the result of pixel classifications.

Figure 10 shows an embodiment of the UVB pixel classifications program according to land corona discharge.In this non-limiting example, image from image-generating unit 400 is first applied to limit algorithm 810 according to Limiting Level, Limiting Level is (namely, being therefore noise) selected according to the experimental data about the image being land corona discharge.The pixel of the first kind is brighter than Equations of The Second Kind pixel---and the pixel of the first kind is made into brighter, and the pixel of Equations of The Second Kind is made into darker.Select to distinguish the first kind and Equations of The Second Kind (such as, based on the image of the image from land corona discharge or the experimental data of scene) by the judgement of standard, limit algorithm 810 distinguishes corona discharge pixel and non-corona discharge pixel effectively.

Similarly, the brightness of pixel or shape can change in time, the pixel of the pattern that time integral light filter can be determined at Matching Experiment and be not test the pattern determined pixel between select---this is algorithm 820.

Similarly, if pixel be corona discharge pixel or be not neighbours from it pixel---such as adopt density filter 830, this may determine.

In certain embodiments, for determining that the pixel provided is that the standard of land corona pixel or non-corona discharge pixel can adjust according to the ambient level of the non-corona discharge UVB radiation in scene 200.Such as, on bright daytime, the pixel provided more is similar to noise than corona discharge, and more strict standard can be adopted to be what discharge to indicate pixel.Similarly, at noon, can be such example, compared to morning or dusk.In certain embodiments, pixel classifications (thus image procossing) can change the estimation of the ambient level of the UVB radiation in response to non-corona discharge.Such as, at 8 a.m., first limit can be adopted, at noon, can automatically regulate.

The non-corona discharge UVB radiation level of surrounding environment does not have the UVB image of object by analysis yet and determines---such as, according to density algorithm.

Figure 11 A-11E shows for the example of UVB corona peak tunable filter 410 in UVB scope internal optical density.Some or all light filters shown in Figure 11 A-11E can have such characteristic: be at least 4 or at least 6 or at least 8 or at least 10 at the mean value of the min [OD (λ), 10] of [280nm, 700nm] scope.For any wavelength, the value of function min [OD (λ), 10] is the minimum value of (i) light filter between the actual OD value and (ii) numerical value 10 of wavelength X.

Figure 12 shows the program performed by the device shown in Fig. 4 A, and this program comprises step S101, S105, S109, S110, S111, S112, S115, S181, S185, S151 and S161.

Figure 13 is the block schematic diagram that the exemplary UVB-visible ray section according to some specific embodiments is mixed into picture device.

Definition

In order to concise explanation, in the context of here instructions, illustrate multiple different term.These terms in this application here or the definition in other place be reach such degree significantly or impliedly, be namely understood to meet the scope that use that those skilled in the art define is relevant.And such definition is the broadest possible implication being built as these term usages.

As discussed above, between " object " (such as, object 210 or 220) and corona discharge 230A difference---the former is macroscopic, the latter is that naked eyes are sightless.

" land corona discharge " is contrary with solar radiation---namely, the sun also has corona.Non-terrestrial corona radiation is any UVB radiation except the corona discharge of land---namely, and the UVB radiation of solar radiation or surface source, the radiation that such as bulb or fire or electric welding send.

Unless otherwise indicated, non-terrestrial corona discharge is different from the electric discharge produced with the source of " flash burn " (such as lightning).

When a scene " is illuminated " by non-terrestrial corona radiation, the existence of non-terrestrial corona radiation is inappreciable (that is to say, be different from trace)---such as, be similar to the night only having some stars.

" corona discharge pixel " is the pixel of the image of land corona discharge.Other pixels each of UVB image are " non-corona discharge pixel ".

In the present invention, " electronic circuit " is the combination in any broadly describing hardware, software and/or firmware.

Any element disclosed herein can comprise or be implemented as " electronic circuit ".Electronic circuit can comprise any executable code module (namely, be stored in computer-readable medium) and/or firmware and/or hardware element, include but not limited to: field programmable logic array (FPLA) element, firmware hardwired logic element, field programmable gate array (FPGA) element and application-specific IC (ASIC) element.Any instruction set architecture may be utilized, and includes but not limited to: Reduced Instruction Set Computer (RISC) framework and/or complex instruction set computer (CISC) (CISC) framework.Electronic circuit can be positioned in independent position or be distributed between multiple position, and wherein, multiple electronic component can be electrically connected mutually in a wired or wireless fashion.

It is also to be noted that by reference to the accompanying drawings, above-mentioned any embodiment also comprises the instruction and/or data that receive on a computer-readable medium, send or store and perform aforesaid operations.Generally speaking, computer-readable medium can comprise storage medium or memory body medium, such as magnetic medium or flash media or optical medium, such as CD or CD-ROM, volatibility or non-volatile media, such as RAM, ROM etc., and transmission medium or such as electric signal, electromagnetic signal or the digital signal transmitted by such as network and/or wireless link lamp communication media.

Therefore, although exemplary embodiment above has carried out abundant description, it will be apparent to one skilled in the art that in addition many they equivalent, change, modify and improved procedure, be all feasible, do not depart from the scope and spirit of accompanying claim.Especially, different embodiments can comprise the combination of feature, and is not limited to combination as described herein.Therefore, claim is not limited to content of the discussions here.

Accompanying drawing explanation

Fig. 1 shows UVB corona peak (prior art).

Fig. 2 shows by the image comprising the scene of land corona generated under UVB visible light wave range mixing imaging device by day outdoor situation.

Fig. 3 is the schematic diagram that display comprises the scene of visible ray object and land corona discharge.

Fig. 4 A to Fig. 4 F and Figure 13 is the ingredient figure of exemplary UV-visible light wave range mixing imaging device.

Fig. 5 is the schematic diagram not having the UVB image of object of the scene shown in Fig. 3.

Fig. 6 is the schematic diagram of the visible light wave range image of the scene shown in Fig. 3.

Fig. 7 is the schematic diagram of the UVB-visible light wave range vision-mix of the scene shown in Fig. 3.

Fig. 8 to Figure 10 relates to the image processing algorithm of the pixel of a classification of the UVB image not having object

Figure 11 A to Figure 11 E shows for UVB corona peak value tunable filter.

Figure 12 A and 12B is the block scheme of the exemplary UVB-visible light wave range mixing formation method being configured for process land corona discharge.

Figure 13 is the block scheme of exemplary UVB-visible light wave range mixing imaging device.

Claims

1. a finder, described finder comprises:

A.UVB imaging device, comprises first group of photodetector and wavelength dependence type light filter; Described UVB imaging device is configured to be incident on described first group of photodetector through the UVB image producing scene after light filter from the UVB light of scene, and described wavelength dependence type light filter has optical density OD (λ) value met the following conditions:

The mean value of the min [OD (λ), 10] i. in wavelength coverage [280nm, 700nm] is the value of x, x is at least 2;

Ii. for being selected from UVB corona peak scope group { [281nm, 285nm], [292nm, 302nm], [308nm, 320nm], [334nm, 340nm], [351nm, 362nm] } at least one wavelength of at least one scope, the optical density OD value of described light filter is the value of maximum y, y is maximum 1;

B. visible light wave range imaging device, comprises second group of photodetector, and described visible light wave range imaging device is configured to be incident on from the visible ray of scene the visible light wave range image that described second group of photodetector produces scene; And

C. video display devices, be configured to display visible light wave range-UVB vision-mix, it is the superposition with hypograph: (i) described visible light wave range image or its derivant; And (ii) described UVB image or its derivant;

Wherein:

I. common optical axis shared by described UVB imaging device and described visible light wave range imaging device;

Ii. described second group of photodetector is arranged in the visual field of described UVB imaging device; And

Iii. from maximum 50% intensity of described scene UVB only stop by the part of the visible light wave range in the visual field of described UVB imaging device.

2. finder according to claim 1, is characterized in that: the value of x is at least 3.

3. finder according to claim 1 and 2, is characterized in that: the value of x is at least 4.

4. finder according to claim 1 and 2, is characterized in that: the value of x is at least 5.

5. finder according to claim 1 and 2, is characterized in that: the value of x is at least 6.

6. finder according to claim 1 and 2, is characterized in that: the value of y is at least 0.75.

7. finder according to claim 1 and 2, is characterized in that: the value of y is at least 0.5.

8. finder according to claim 1 and 2, is characterized in that: the value of y is at least 0.25.

9. finder according to claim 1 and 2, is characterized in that: the value of y is at least 0.1.

10. finder according to claim 1 and 2, is characterized in that: from maximum 30% intensity of described scene UVB only stop by the part of the visible light wave range in the visual field of described UVB imaging device.

11. finders according to claim 1 and 2, is characterized in that: from maximum 20% intensity of described scene UVB only stop by the part of the visible light wave range in the visual field of described UVB imaging device.

12. finders according to claim 1 and 2, is characterized in that: from maximum 10% intensity of described scene UVB only stop by the part of the visible light wave range in the visual field of described UVB imaging device.

13. finders according to claim 1 and 2, is characterized in that: described second group of photodetector is positioned at completely in the visual field of described UVB imaging device, without the need to any to weaken the visible ray section image-generating unit of the wired connection of UV light and the part on wired connection island; Described video display devices receives the visible light wave range image transmitted from described second group of photodetector by wireless connections.

14. finders according to claim 1 and 2, is characterized in that, described finder also comprises:

B.UVB image processing apparatus, operationally produces UVB process image from UVB image, so that increases the visibility of corona discharge pixel and/or reduce the visibility of non-corona discharge pixel; Described video display devices is configured to show the visible light wave range-UVB vision-mix comprising described UVB process image or derivatives thereof, and described UVB image processing apparatus is configured to produce UVB process image.

15. finders according to claim 14, it is characterized in that: described finder is the estimated strength being configured to obtain non-corona discharge UVB radiant light around, and from described UVB image, produces UVB process image according to the estimated strength of non-corona discharge UVB radiant light.

16. finders according to claim 15, is characterized in that: described finder is configured to the estimated strength of the non-corona discharge UVB radiant light obtaining surrounding according at least one aspect following: (i) fill-in light detecting device; (ii) locator data; (iii) daytime; And (iv) climatic data.

17. finders according to claim 16, it is characterized in that: described UVB image processing apparatus is the change being configured to respond by changing limite function the estimation ambient level of non-corona discharge UVB radiant light, so that the contrast be increased between corona discharge pixel and non-corona discharge pixel is in response to the increase estimating ambient level.

18. finders according to claim 16, it is characterized in that: described UVB image processing apparatus is the change that the corona discharge classification limite function be configured to by changing described pixel responds the estimation ambient level of non-corona discharge UVB radiant light, so that increase described limite function in response to the increase estimating ambient level, and reduce described limite function in response to the minimizing estimating ambient level.

19. 1 kinds of finders, described finder comprises:

A.UVB imaging device, comprises first group of photodetector and wavelength dependence type light filter; Described UVB imaging device is configured to the UVB image producing scene from the UVB light of scene incident on described first group of photodetector;

B. visible light wave range imaging device, comprise be arranged on described UVB imaging device the visual field in second group of photodetector, described visible light wave range imaging device is configured to produce visible light wave range image from the visible ray of scene incident on described second group of photodetector; And

C. video display devices, be configured to display visible light wave range-UVB vision-mix, it is the superposition with hypograph: (i) described visible light wave range image or its derivant; And (ii) described UVB process image or its derivant.

20. finders according to claim 19, is characterized in that: common optical axis shared by described UVB imaging device and described visible light wave range imaging device.

21. finders according to claim 19 or 20, is characterized in that: described UVB imaging device is configured to be incident on from the UVB light of scene the UVB imaging device that described first group of photodetector produces the image of scene.

22. finders according to claim 21, is characterized in that, also comprise: be arranged on the UVB wavelength dependence type light filter in the light path between described scene and described first group of photodetector.

23. finders according to claim 22, is characterized in that: the optical density change that described UVB wavelength dependence type light filter has filter value heterogeneous in UVB spectrum so that described UVB wavelength dependence type light filter has functional relation with the wavelength in UVB spectrum.

24. finders according to claim 23, it is characterized in that: described finder also comprises the UVB wavelength dependence type light filter in the light path that is arranged between described scene and described first group of photodetector, and described wavelength dependence type light filter has optical density OD (λ) value met the following conditions:

I. the value being at least x, x at the mean value of the min [OD (λ), 10] of wavelength coverage [280nm, 700nm] is at least 2 or at least 3 or at least 4 or at least 5 or at least 6;

Ii. for being selected from UVB corona peak scope group { [281nm, 285nm], [292nm, 302nm], [308nm, 320nm], [334nm, 340nm], [351nm, 362nm] } at least one wavelength of at least one scope, the optical density OD value of described light filter is the value of maximum y, y is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1.

25. finders according to claim 23 or 24, is characterized in that: described UVB imaging device is configured to be incident on from the UVB light of scene the UVB imaging device that described first group of photodetector produces the image of scene.

26. according to one of any described finder of claim 19-20, it is characterized in that: also comprise the sunspot filtrator in the light path that is arranged between described scene and described first group of photodetector, described sunspot filtrator has optical density OD (λ) value met the following conditions:

I. at least one wavelength in wavelength coverage [280nm, 700nm], the optical density OD of described filtrator is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1;

Ii. the value being at least x, x at the mean value of the min [OD (λ), 10] of wavelength coverage [280nm, 700nm] is at least 2.

27. finders according to claim 26, is characterized in that: the value of x is at least 3.

28. finders according to claim 26, is characterized in that: the value of x is at least 4.

29. finders according to claim 26, is characterized in that: the value of x is at least 5.

30. finders according to claim 26, is characterized in that: the value of x is at least 6.

31. according to one of any described finder of claim 19-20, it is characterized in that: also comprise the sunspot filtrator in the light path that is arranged between described scene and described first group of photodetector, described sunspot filtrator has optical density OD (λ) value met the following conditions:

I. for the most of wavelength in wavelength coverage [280nm, 700nm], the optical density OD of described filtrator is maximum 1 or maximum 0.75 or maximum 0.5 or maximum 0.25 or maximum 0.1;

32. finders according to claim 31, is characterized in that: the value of x is at least 3.

33. finders according to claim 31, is characterized in that: the value of x is at least 4.

34. finders according to claim 31, is characterized in that: the value of x is at least 5.

35. finders according to claim 31, is characterized in that: the value of x is at least 6.